Alaska Rein Orchid, Slender-spire orchid

1 or few stems, leafy near base, with pale green, bilaterally symmetrical flowers in long, slender, open racemes.

The species name comes from Unalaska, an island in the Aleutians. A number of small northern orchids were formerly put in the inclusive genus Habenaria, which has been divided into several smaller genera, including Piperia.